<template>
  <h4>当前求和为：{{ sum }}</h4>
  <button @click="sum++">点我++</button>
  <hr>
  <h2>姓名：{{ name }}</h2>
  <h2>年龄：{{ age }}</h2>
  <h2>薪资：{{ job.j1.salary }}</h2>
  <button @click="name += '~'">修改姓名</button>
  <button @click="age++ ">增长年龄</button>
  <button @click="job.j1.salary++">涨薪</button>
</template>

<script>
import {ref, reactive, toRefs, readonly, shallowReadonly} from 'vue'
export default {
  name: 'Demo',
  //数据
  setup(){
    //数据
      let sum = ref(0)
      let person = reactive({
      name: '张三',
      age: 18,
      job: {
          j1: {
              salary: 20
          }
      }
    })

    // person = readonly(person)
    // person = shallowReadonly(person)
    sum = readonly(sum)
    sum = shallowReadonly(sum)


 
    //返回一个对象（常用）
    return {
      sum,
      ...toRefs(person),
    }
  }
}
</script>

